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Preparation method of antimonous sulfide/AgI/Ag/BON photocatalyst for soil remediation

A photocatalyst and soil remediation technology, applied in physical/chemical process catalysts, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of harsh process conditions, high equipment requirements, secondary pollution of adsorbents, etc., and achieve easy industrialization. The production and preparation methods are simple and the effect of excellent catalytic performance

Pending Publication Date: 2020-06-16
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption method has relatively high requirements for equipment, and there is a problem of high operating costs, and the adsorbent is easy to cause secondary pollution
The biological method has the selectivity and specificity of strains, and the shedding of the microbial group will affect the purification treatment effect during long-term use
Although thermal destruction technology has high treatment efficiency for gas pollutants in soil, there are problems such as harsh process conditions and easy poisoning of catalysts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of Sb for soil remediation 2 S 3 The preparation method of / AgI / Ag / BON photocatalyst comprises:

[0016] (1) At room temperature, a certain amount of Bi 5 o 7 I was added to deionized water, added to 8mL 0.5M NaOH under magnetic stirring, continued to stir for 2h, and was collected by centrifugal drying to obtain product A; wherein Bi 5 o 7 The mass ratio of I and sodium hydroxide is 1:50

[0017] (2) Add the product obtained in step (1) to the dispersed aqueous solution containing antimony trichloride and L-cysteine ​​at a mass ratio of 20:1, add P123 tri-block copolymerization, and heat at 140°C After reacting for 10 h, the product B was washed and dried.

[0018] (3) Ultrasonic disperse the product B obtained in step (2), add it to 1 mL of 0.1 mol / L silver nitrate solution, ultrasonicate for 10 min, stir for 2 hours, then collect the product, and irradiate it under a 1000W xenon lamp for 30 min.

Embodiment 2

[0020] A kind of Sb for soil remediation 2 S 3 The preparation method of / AgI / Ag / BON photocatalyst comprises:

[0021] (1) At room temperature, a certain amount of Bi 5 o 7 I was added to deionized water, added to 8mL 0.75M NaOH under magnetic stirring, continued to stir for 2.5h, and was collected by centrifugal drying to obtain product A; 5 o 7 The mass ratio of I and sodium hydroxide is 1:75;

[0022] (2) Add the product obtained in step (1) to the dispersed aqueous solution containing antimony trichloride and L-cysteine ​​at a mass ratio of 35:1, add P123 tri-block copolymerization, and heat the reaction at 150°C 13h, washing and drying the product B.

[0023] (3) Ultrasonic disperse the product B obtained in step (2), add 1.5mL of 0.1mol / L silver nitrate solution, ultrasonicate for 20min, stir for 3 hours, then collect the product, and illuminate it under a 1000W xenon lamp for 45min.

Embodiment 3

[0025] A kind of Sb for soil remediation 2 S 3 The preparation method of / AgI / Ag / BON photocatalyst comprises:

[0026] (1) At room temperature, a certain amount of Bi 5 o 7 I was added to deionized water, added to 8mL of 1M NaOH under magnetic stirring, continued to stir for 3h, and was collected by centrifugal drying to obtain product A; 5 o 7 The mass ratio of I and sodium hydroxide is 100:1;

[0027] (2) Add the product obtained in step (1) to the dispersed aqueous solution containing antimony trichloride and L-cysteine ​​at a mass ratio of 50:1, add P123 tri-block copolymerization, and heat the reaction at 160°C 16h, wash and dry the product B.

[0028] (3) Ultrasonic disperse the product B obtained in step (2), add 2 mL of 0.1 mol / L silver nitrate solution, ultrasonicate for 30 min, stir for 4 hours, then collect the product, and irradiate it under a 1000W xenon lamp for 60 min.

[0029] With polychlorinated biphenyls as the pollutant treatment object in soil, the ...

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Abstract

The invention relates to a preparation method of a Sb2S3 / AgI / Ag / BON photocatalyst for soil remediation. The preparation method comprises the steps: adding Bi5O7I into a 0.5-1 M NaOH solution, stirringfor a period of time, collecting a product A, adding the product A into a stable dispersion solution containing antimony trichloride and L-cysteine, carrying out hydrothermal reaction at the temperature of 140 DEG C-160 DEG C for 10-16 h, cooling, carrying out suction filtration, washing and drying to obtain a composite product B; and adding the product B into a silver nitrate solution, carryingout ultrasonic treatment for 10-30 min, stirring for 2-4 h, filtering, drying, illuminating for 30-60 min under a 100 W xenon lamp, and drying to obtain the Sb2S3 / AgI / Ag / BON photocatalytic material. The method is simple to operate, and the reaction process is easy to control. The method is suitable for industrial production, and has green, clean and environment-friendly effects.

Description

technical field [0001] The invention belongs to the new field of soil remediation and treatment technology, in particular to a catalyst Sb for soil remediation 2 S 3 / AgI / Ag / BON preparation method. Background technique [0002] With the growth of population and the development of industrialization, the problem of soil pollution has become one of the most serious environmental problems, which has seriously affected the harmonious development of society. The problem of soil restoration is an important issue facing today's society. Soil governance has nearly 5 trillion governance Engineering Market Outlook. Soil treatment technologies mainly include adsorption method, biological method, thermal destruction method and photocatalytic degradation method. The adsorption method has relatively high requirements on equipment, and has the problem of high operating costs, and the adsorbent is easy to cause secondary pollution. The biological method has selectivity and specificity of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C09K17/02
CPCB01J27/24C09K17/02B01J35/39
Inventor 张漓杉钟山刘保江高品
Owner GUILIN UNIV OF ELECTRONIC TECH
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